The following table lists the intracellular osmolality concentrations of four osmoconforming organisms that are known to mimic the osmotic conditions of their surroundings.A population of organisms that are not osmoconformers is dropped into the tank with Organism 1. The intracellular osmolality of Organism 1 begins to slightly decrease. Which of the following could explain this?
(A) The new organisms were hypotonic compared to the tank and they lost water via osmosis.
(B) The new organisms expelled waste products that increased the tank's osmolality.
(C) The new organism competed with organism 1 for food and caused it to become active.
(D) The new organism ingested large amounts of fluid and the tank fluid level decreased.

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Table 1. Osmolality concentrations of osmoconforming organisms Organism 1 100 m0sm kg-¹ Organism 2 400 m0sm kg-¹ Organism 3 500 mOsm kg-¹ Organism 4 150 m0sm kg¹ Organism 5 350 m0sm kg-¹